I think a nice addition to the package would be travis-ci server integration so here it comes this patch that allows to run the tests after each push on github via the travis-ci hook.
Adding the "scripts" attribute to package.json also allows to run the test in the terminal by typing a simple npm test command.
One thing, if you decide to merge this in master you should update .travis.yml configuration in order to run the tests on the master branch instead of travis. Of course you should also add travis-ci hook to your original repo.
There is a failing spec, maybe you would want to fix it in order to display on the github page a nice green badge (you can check my travis branch to see how it would look).
If you have any question feel free to ask.. I hope to contribute more in the future :)
add travis integration
+1 for integrating this feature.